#! /bin/sh # # newsyntax38 -- update a screenrc file from 3.3 to 3.8 syntax # # Please bring your scripts up to syntax level 3.3 before running this script. # Please check all comments after running this script and watch out # for funny passages. # # * aka and shellaka are replaced by title and shelltitle. # # * Pairs of termcap and terminfo commands are folded into a single # termcapinfo command where possible. # # * trailing blanks are zapped. Unintentionally. # # 12.10.95, jnweiger, use at your own risk. # if [ $# != 1 ]; then echo "usage $0 screenrcfile" echo "" echo "The named file will be updated in place to the syntax of screen 3.8" echo "A backup copy will be written to <screenrcfile>.bak" exit 1; fi #Ultrix 4.2 /bin/sh does not handle "read a < $1" #Dean Gaudet <dgaudet@watdragon.uwaterloo.ca> exec < $1 read a if [ "$a" = "#3.8" ]; then echo "$1 already updated" exit 0 fi rm -f $1.old $1.dups cp $1 $1.old echo "#3.8" > $1 echo "# Do not remove the above line. This screen rc file was updated" >> $1 echo "# by the newsyntax script." >> $1 # termcap and terminfo lines can only be folded when there is no parameter # expansion in the codes. Parameters are denoted differently in # termcap and termcap syntax. Everything else is identical, I assume. # Thus codes not containing '%' can be savely folded. sed < $1.old > $1.dups \ -e 's/^\([ #]*\)aka/\1title/' \ -e 's/^\([ #]*\)shellaka/\1shelltitle/' \ -e 's/^\([ #]*\)termcap[ ][ ]*\([^%]*$\)/\1termcapinfo \2/' \ -e 's/^\([ #]*\)terminfo[ ][ ]*\([^%]*$\)/\1termcapinfo \2/' \ -e 's/\\/\\\\/g' # Oh, my bourne shell seems to gobble backslashes while reading. # Thus the sed above duplicates them in advance. # Hope this is not just another silly bash featureism. # It still zaps trailing blanks. I do not know why. But that is nice. exec < $1.dups while read a ; do if [ "$a" = "$b" ]; then case "$a" in *termcapinfo*) continue ;; esac fi echo "$a" >> $1 b="$a" done rm -f $1.dups